1 /* 2 * Adaptec AIC79xx device driver for Linux. 3 * 4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $ 5 * 6 * -------------------------------------------------------------------------- 7 * Copyright (c) 1994-2000 Justin T. Gibbs. 8 * Copyright (c) 1997-1999 Doug Ledford 9 * Copyright (c) 2000-2003 Adaptec Inc. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 3. Neither the names of the above-listed copyright holders nor the names 24 * of any contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * Alternatively, this software may be distributed under the terms of the 28 * GNU General Public License ("GPL") version 2 as published by the Free 29 * Software Foundation. 30 * 31 * NO WARRANTY 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 * POSSIBILITY OF SUCH DAMAGES. 43 */ 44 45 #include "aic79xx_osm.h" 46 #include "aic79xx_inline.h" 47 #include <scsi/scsicam.h> 48 49 static struct scsi_transport_template *ahd_linux_transport_template = NULL; 50 51 #include <linux/init.h> /* __setup */ 52 #include <linux/mm.h> /* For fetching system memory size */ 53 #include <linux/blkdev.h> /* For block_size() */ 54 #include <linux/delay.h> /* For ssleep/msleep */ 55 #include <linux/device.h> 56 #include <linux/slab.h> 57 58 /* 59 * Bucket size for counting good commands in between bad ones. 60 */ 61 #define AHD_LINUX_ERR_THRESH 1000 62 63 /* 64 * Set this to the delay in seconds after SCSI bus reset. 65 * Note, we honor this only for the initial bus reset. 66 * The scsi error recovery code performs its own bus settle 67 * delay handling for error recovery actions. 68 */ 69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS 70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 71 #else 72 #define AIC79XX_RESET_DELAY 5000 73 #endif 74 75 /* 76 * To change the default number of tagged transactions allowed per-device, 77 * add a line to the lilo.conf file like: 78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 79 * which will result in the first four devices on the first two 80 * controllers being set to a tagged queue depth of 32. 81 * 82 * The tag_commands is an array of 16 to allow for wide and twin adapters. 83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 84 * for channel 1. 85 */ 86 typedef struct { 87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 88 } adapter_tag_info_t; 89 90 /* 91 * Modify this as you see fit for your system. 92 * 93 * 0 tagged queuing disabled 94 * 1 <= n <= 253 n == max tags ever dispatched. 95 * 96 * The driver will throttle the number of commands dispatched to a 97 * device if it returns queue full. For devices with a fixed maximum 98 * queue depth, the driver will eventually determine this depth and 99 * lock it in (a console message is printed to indicate that a lock 100 * has occurred). On some devices, queue full is returned for a temporary 101 * resource shortage. These devices will return queue full at varying 102 * depths. The driver will throttle back when the queue fulls occur and 103 * attempt to slowly increase the depth over time as the device recovers 104 * from the resource shortage. 105 * 106 * In this example, the first line will disable tagged queueing for all 107 * the devices on the first probed aic79xx adapter. 108 * 109 * The second line enables tagged queueing with 4 commands/LUN for IDs 110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 111 * driver to attempt to use up to 64 tags for ID 1. 112 * 113 * The third line is the same as the first line. 114 * 115 * The fourth line disables tagged queueing for devices 0 and 3. It 116 * enables tagged queueing for the other IDs, with 16 commands/LUN 117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 118 * IDs 2, 5-7, and 9-15. 119 */ 120 121 /* 122 * NOTE: The below structure is for reference only, the actual structure 123 * to modify in order to change things is just below this comment block. 124 adapter_tag_info_t aic79xx_tag_info[] = 125 { 126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 130 }; 131 */ 132 133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 135 #else 136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 137 #endif 138 139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \ 140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 148 } 149 150 /* 151 * By default, use the number of commands specified by 152 * the users kernel configuration. 153 */ 154 static adapter_tag_info_t aic79xx_tag_info[] = 155 { 156 {AIC79XX_CONFIGED_TAG_COMMANDS}, 157 {AIC79XX_CONFIGED_TAG_COMMANDS}, 158 {AIC79XX_CONFIGED_TAG_COMMANDS}, 159 {AIC79XX_CONFIGED_TAG_COMMANDS}, 160 {AIC79XX_CONFIGED_TAG_COMMANDS}, 161 {AIC79XX_CONFIGED_TAG_COMMANDS}, 162 {AIC79XX_CONFIGED_TAG_COMMANDS}, 163 {AIC79XX_CONFIGED_TAG_COMMANDS}, 164 {AIC79XX_CONFIGED_TAG_COMMANDS}, 165 {AIC79XX_CONFIGED_TAG_COMMANDS}, 166 {AIC79XX_CONFIGED_TAG_COMMANDS}, 167 {AIC79XX_CONFIGED_TAG_COMMANDS}, 168 {AIC79XX_CONFIGED_TAG_COMMANDS}, 169 {AIC79XX_CONFIGED_TAG_COMMANDS}, 170 {AIC79XX_CONFIGED_TAG_COMMANDS}, 171 {AIC79XX_CONFIGED_TAG_COMMANDS} 172 }; 173 174 /* 175 * The I/O cell on the chip is very configurable in respect to its analog 176 * characteristics. Set the defaults here; they can be overriden with 177 * the proper insmod parameters. 178 */ 179 struct ahd_linux_iocell_opts 180 { 181 uint8_t precomp; 182 uint8_t slewrate; 183 uint8_t amplitude; 184 }; 185 #define AIC79XX_DEFAULT_PRECOMP 0xFF 186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF 187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF 188 #define AIC79XX_DEFAULT_IOOPTS \ 189 { \ 190 AIC79XX_DEFAULT_PRECOMP, \ 191 AIC79XX_DEFAULT_SLEWRATE, \ 192 AIC79XX_DEFAULT_AMPLITUDE \ 193 } 194 #define AIC79XX_PRECOMP_INDEX 0 195 #define AIC79XX_SLEWRATE_INDEX 1 196 #define AIC79XX_AMPLITUDE_INDEX 2 197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 198 { 199 AIC79XX_DEFAULT_IOOPTS, 200 AIC79XX_DEFAULT_IOOPTS, 201 AIC79XX_DEFAULT_IOOPTS, 202 AIC79XX_DEFAULT_IOOPTS, 203 AIC79XX_DEFAULT_IOOPTS, 204 AIC79XX_DEFAULT_IOOPTS, 205 AIC79XX_DEFAULT_IOOPTS, 206 AIC79XX_DEFAULT_IOOPTS, 207 AIC79XX_DEFAULT_IOOPTS, 208 AIC79XX_DEFAULT_IOOPTS, 209 AIC79XX_DEFAULT_IOOPTS, 210 AIC79XX_DEFAULT_IOOPTS, 211 AIC79XX_DEFAULT_IOOPTS, 212 AIC79XX_DEFAULT_IOOPTS, 213 AIC79XX_DEFAULT_IOOPTS, 214 AIC79XX_DEFAULT_IOOPTS 215 }; 216 217 /* 218 * There should be a specific return value for this in scsi.h, but 219 * it seems that most drivers ignore it. 220 */ 221 #define DID_UNDERFLOW DID_ERROR 222 223 void 224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 225 { 226 printk("(scsi%d:%c:%d:%d): ", 227 ahd->platform_data->host->host_no, 228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 230 scb != NULL ? SCB_GET_LUN(scb) : -1); 231 } 232 233 /* 234 * XXX - these options apply unilaterally to _all_ adapters 235 * cards in the system. This should be fixed. Exceptions to this 236 * rule are noted in the comments. 237 */ 238 239 /* 240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 241 * has no effect on any later resets that might occur due to things like 242 * SCSI bus timeouts. 243 */ 244 static uint32_t aic79xx_no_reset; 245 246 /* 247 * Should we force EXTENDED translation on a controller. 248 * 0 == Use whatever is in the SEEPROM or default to off 249 * 1 == Use whatever is in the SEEPROM or default to on 250 */ 251 static uint32_t aic79xx_extended; 252 253 /* 254 * PCI bus parity checking of the Adaptec controllers. This is somewhat 255 * dubious at best. To my knowledge, this option has never actually 256 * solved a PCI parity problem, but on certain machines with broken PCI 257 * chipset configurations, it can generate tons of false error messages. 258 * It's included in the driver for completeness. 259 * 0 = Shut off PCI parity check 260 * non-0 = Enable PCI parity check 261 * 262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 263 * variable to -1 you would actually want to simply pass the variable 264 * name without a number. That will invert the 0 which will result in 265 * -1. 266 */ 267 static uint32_t aic79xx_pci_parity = ~0; 268 269 /* 270 * There are lots of broken chipsets in the world. Some of them will 271 * violate the PCI spec when we issue byte sized memory writes to our 272 * controller. I/O mapped register access, if allowed by the given 273 * platform, will work in almost all cases. 274 */ 275 uint32_t aic79xx_allow_memio = ~0; 276 277 /* 278 * So that we can set how long each device is given as a selection timeout. 279 * The table of values goes like this: 280 * 0 - 256ms 281 * 1 - 128ms 282 * 2 - 64ms 283 * 3 - 32ms 284 * We default to 256ms because some older devices need a longer time 285 * to respond to initial selection. 286 */ 287 static uint32_t aic79xx_seltime; 288 289 /* 290 * Certain devices do not perform any aging on commands. Should the 291 * device be saturated by commands in one portion of the disk, it is 292 * possible for transactions on far away sectors to never be serviced. 293 * To handle these devices, we can periodically send an ordered tag to 294 * force all outstanding transactions to be serviced prior to a new 295 * transaction. 296 */ 297 static uint32_t aic79xx_periodic_otag; 298 299 /* Some storage boxes are using an LSI chip which has a bug making it 300 * impossible to use aic79xx Rev B chip in 320 speeds. The following 301 * storage boxes have been reported to be buggy: 302 * EonStor 3U 16-Bay: U16U-G3A3 303 * EonStor 2U 12-Bay: U12U-G3A3 304 * SentinelRAID: 2500F R5 / R6 305 * SentinelRAID: 2500F R1 306 * SentinelRAID: 2500F/1500F 307 * SentinelRAID: 150F 308 * 309 * To get around this LSI bug, you can set your board to 160 mode 310 * or you can enable the SLOWCRC bit. 311 */ 312 uint32_t aic79xx_slowcrc; 313 314 /* 315 * Module information and settable options. 316 */ 317 static char *aic79xx = NULL; 318 319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 321 MODULE_LICENSE("Dual BSD/GPL"); 322 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 323 module_param(aic79xx, charp, 0444); 324 MODULE_PARM_DESC(aic79xx, 325 "period-delimited options string:\n" 326 " verbose Enable verbose/diagnostic logging\n" 327 " allow_memio Allow device registers to be memory mapped\n" 328 " debug Bitmask of debug values to enable\n" 329 " no_reset Suppress initial bus resets\n" 330 " extended Enable extended geometry on all controllers\n" 331 " periodic_otag Send an ordered tagged transaction\n" 332 " periodically to prevent tag starvation.\n" 333 " This may be required by some older disk\n" 334 " or drives/RAID arrays.\n" 335 " tag_info:<tag_str> Set per-target tag depth\n" 336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 339 " amplitude:<int> Set the signal amplitude (0-7).\n" 340 " seltime:<int> Selection Timeout:\n" 341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 343 "\n" 344 " Sample modprobe configuration file:\n" 345 " # Enable verbose logging\n" 346 " # Set tag depth on Controller 2/Target 2 to 10 tags\n" 347 " # Shorten the selection timeout to 128ms\n" 348 "\n" 349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 350 ); 351 352 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 353 struct scsi_device *, 354 struct scb *); 355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 356 struct scsi_cmnd *cmd); 357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 360 struct ahd_devinfo *devinfo); 361 static void ahd_linux_device_queue_depth(struct scsi_device *); 362 static int ahd_linux_run_command(struct ahd_softc*, 363 struct ahd_linux_device *, 364 struct scsi_cmnd *); 365 static void ahd_linux_setup_tag_info_global(char *p); 366 static int aic79xx_setup(char *c); 367 static void ahd_freeze_simq(struct ahd_softc *ahd); 368 static void ahd_release_simq(struct ahd_softc *ahd); 369 370 static int ahd_linux_unit; 371 372 373 /************************** OS Utility Wrappers *******************************/ 374 void ahd_delay(long); 375 void 376 ahd_delay(long usec) 377 { 378 /* 379 * udelay on Linux can have problems for 380 * multi-millisecond waits. Wait at most 381 * 1024us per call. 382 */ 383 while (usec > 0) { 384 udelay(usec % 1024); 385 usec -= 1024; 386 } 387 } 388 389 390 /***************************** Low Level I/O **********************************/ 391 uint8_t ahd_inb(struct ahd_softc * ahd, long port); 392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); 393 void ahd_outw_atomic(struct ahd_softc * ahd, 394 long port, uint16_t val); 395 void ahd_outsb(struct ahd_softc * ahd, long port, 396 uint8_t *, int count); 397 void ahd_insb(struct ahd_softc * ahd, long port, 398 uint8_t *, int count); 399 400 uint8_t 401 ahd_inb(struct ahd_softc * ahd, long port) 402 { 403 uint8_t x; 404 405 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 406 x = readb(ahd->bshs[0].maddr + port); 407 } else { 408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 409 } 410 mb(); 411 return (x); 412 } 413 414 #if 0 /* unused */ 415 static uint16_t 416 ahd_inw_atomic(struct ahd_softc * ahd, long port) 417 { 418 uint8_t x; 419 420 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 421 x = readw(ahd->bshs[0].maddr + port); 422 } else { 423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 424 } 425 mb(); 426 return (x); 427 } 428 #endif 429 430 void 431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) 432 { 433 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 434 writeb(val, ahd->bshs[0].maddr + port); 435 } else { 436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 437 } 438 mb(); 439 } 440 441 void 442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) 443 { 444 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 445 writew(val, ahd->bshs[0].maddr + port); 446 } else { 447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 448 } 449 mb(); 450 } 451 452 void 453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 454 { 455 int i; 456 457 /* 458 * There is probably a more efficient way to do this on Linux 459 * but we don't use this for anything speed critical and this 460 * should work. 461 */ 462 for (i = 0; i < count; i++) 463 ahd_outb(ahd, port, *array++); 464 } 465 466 void 467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 468 { 469 int i; 470 471 /* 472 * There is probably a more efficient way to do this on Linux 473 * but we don't use this for anything speed critical and this 474 * should work. 475 */ 476 for (i = 0; i < count; i++) 477 *array++ = ahd_inb(ahd, port); 478 } 479 480 /******************************* PCI Routines *********************************/ 481 uint32_t 482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) 483 { 484 switch (width) { 485 case 1: 486 { 487 uint8_t retval; 488 489 pci_read_config_byte(pci, reg, &retval); 490 return (retval); 491 } 492 case 2: 493 { 494 uint16_t retval; 495 pci_read_config_word(pci, reg, &retval); 496 return (retval); 497 } 498 case 4: 499 { 500 uint32_t retval; 501 pci_read_config_dword(pci, reg, &retval); 502 return (retval); 503 } 504 default: 505 panic("ahd_pci_read_config: Read size too big"); 506 /* NOTREACHED */ 507 return (0); 508 } 509 } 510 511 void 512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) 513 { 514 switch (width) { 515 case 1: 516 pci_write_config_byte(pci, reg, value); 517 break; 518 case 2: 519 pci_write_config_word(pci, reg, value); 520 break; 521 case 4: 522 pci_write_config_dword(pci, reg, value); 523 break; 524 default: 525 panic("ahd_pci_write_config: Write size too big"); 526 /* NOTREACHED */ 527 } 528 } 529 530 /****************************** Inlines ***************************************/ 531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 532 533 static void 534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 535 { 536 struct scsi_cmnd *cmd; 537 538 cmd = scb->io_ctx; 539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 540 scsi_dma_unmap(cmd); 541 } 542 543 /******************************** Macros **************************************/ 544 #define BUILD_SCSIID(ahd, cmd) \ 545 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 546 547 /* 548 * Return a string describing the driver. 549 */ 550 static const char * 551 ahd_linux_info(struct Scsi_Host *host) 552 { 553 static char buffer[512]; 554 char ahd_info[256]; 555 char *bp; 556 struct ahd_softc *ahd; 557 558 bp = &buffer[0]; 559 ahd = *(struct ahd_softc **)host->hostdata; 560 memset(bp, 0, sizeof(buffer)); 561 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" 562 " <"); 563 strcat(bp, ahd->description); 564 strcat(bp, ">\n" 565 " "); 566 ahd_controller_info(ahd, ahd_info); 567 strcat(bp, ahd_info); 568 569 return (bp); 570 } 571 572 /* 573 * Queue an SCB to the controller. 574 */ 575 static int 576 ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 577 { 578 struct ahd_softc *ahd; 579 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 580 int rtn = SCSI_MLQUEUE_HOST_BUSY; 581 582 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 583 584 cmd->scsi_done = scsi_done; 585 cmd->result = CAM_REQ_INPROG << 16; 586 rtn = ahd_linux_run_command(ahd, dev, cmd); 587 588 return rtn; 589 } 590 591 static DEF_SCSI_QCMD(ahd_linux_queue) 592 593 static struct scsi_target ** 594 ahd_linux_target_in_softc(struct scsi_target *starget) 595 { 596 struct ahd_softc *ahd = 597 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 598 unsigned int target_offset; 599 600 target_offset = starget->id; 601 if (starget->channel != 0) 602 target_offset += 8; 603 604 return &ahd->platform_data->starget[target_offset]; 605 } 606 607 static int 608 ahd_linux_target_alloc(struct scsi_target *starget) 609 { 610 struct ahd_softc *ahd = 611 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 612 struct seeprom_config *sc = ahd->seep_config; 613 unsigned long flags; 614 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 615 struct ahd_devinfo devinfo; 616 struct ahd_initiator_tinfo *tinfo; 617 struct ahd_tmode_tstate *tstate; 618 char channel = starget->channel + 'A'; 619 620 ahd_lock(ahd, &flags); 621 622 BUG_ON(*ahd_targp != NULL); 623 624 *ahd_targp = starget; 625 626 if (sc) { 627 int flags = sc->device_flags[starget->id]; 628 629 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 630 starget->id, &tstate); 631 632 if ((flags & CFPACKETIZED) == 0) { 633 /* don't negotiate packetized (IU) transfers */ 634 spi_max_iu(starget) = 0; 635 } else { 636 if ((ahd->features & AHD_RTI) == 0) 637 spi_rti(starget) = 0; 638 } 639 640 if ((flags & CFQAS) == 0) 641 spi_max_qas(starget) = 0; 642 643 /* Transinfo values have been set to BIOS settings */ 644 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 645 spi_min_period(starget) = tinfo->user.period; 646 spi_max_offset(starget) = tinfo->user.offset; 647 } 648 649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 650 starget->id, &tstate); 651 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 652 CAM_LUN_WILDCARD, channel, 653 ROLE_INITIATOR); 654 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 655 AHD_TRANS_GOAL, /*paused*/FALSE); 656 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 657 AHD_TRANS_GOAL, /*paused*/FALSE); 658 ahd_unlock(ahd, &flags); 659 660 return 0; 661 } 662 663 static void 664 ahd_linux_target_destroy(struct scsi_target *starget) 665 { 666 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 667 668 *ahd_targp = NULL; 669 } 670 671 static int 672 ahd_linux_slave_alloc(struct scsi_device *sdev) 673 { 674 struct ahd_softc *ahd = 675 *((struct ahd_softc **)sdev->host->hostdata); 676 struct ahd_linux_device *dev; 677 678 if (bootverbose) 679 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 680 681 dev = scsi_transport_device_data(sdev); 682 memset(dev, 0, sizeof(*dev)); 683 684 /* 685 * We start out life using untagged 686 * transactions of which we allow one. 687 */ 688 dev->openings = 1; 689 690 /* 691 * Set maxtags to 0. This will be changed if we 692 * later determine that we are dealing with 693 * a tagged queuing capable device. 694 */ 695 dev->maxtags = 0; 696 697 return (0); 698 } 699 700 static int 701 ahd_linux_slave_configure(struct scsi_device *sdev) 702 { 703 struct ahd_softc *ahd; 704 705 ahd = *((struct ahd_softc **)sdev->host->hostdata); 706 if (bootverbose) 707 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 708 709 ahd_linux_device_queue_depth(sdev); 710 711 /* Initial Domain Validation */ 712 if (!spi_initial_dv(sdev->sdev_target)) 713 spi_dv_device(sdev); 714 715 return 0; 716 } 717 718 #if defined(__i386__) 719 /* 720 * Return the disk geometry for the given SCSI device. 721 */ 722 static int 723 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 724 sector_t capacity, int geom[]) 725 { 726 uint8_t *bh; 727 int heads; 728 int sectors; 729 int cylinders; 730 int ret; 731 int extended; 732 struct ahd_softc *ahd; 733 734 ahd = *((struct ahd_softc **)sdev->host->hostdata); 735 736 bh = scsi_bios_ptable(bdev); 737 if (bh) { 738 ret = scsi_partsize(bh, capacity, 739 &geom[2], &geom[0], &geom[1]); 740 kfree(bh); 741 if (ret != -1) 742 return (ret); 743 } 744 heads = 64; 745 sectors = 32; 746 cylinders = aic_sector_div(capacity, heads, sectors); 747 748 if (aic79xx_extended != 0) 749 extended = 1; 750 else 751 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 752 if (extended && cylinders >= 1024) { 753 heads = 255; 754 sectors = 63; 755 cylinders = aic_sector_div(capacity, heads, sectors); 756 } 757 geom[0] = heads; 758 geom[1] = sectors; 759 geom[2] = cylinders; 760 return (0); 761 } 762 #endif 763 764 /* 765 * Abort the current SCSI command(s). 766 */ 767 static int 768 ahd_linux_abort(struct scsi_cmnd *cmd) 769 { 770 int error; 771 772 error = ahd_linux_queue_abort_cmd(cmd); 773 774 return error; 775 } 776 777 /* 778 * Attempt to send a target reset message to the device that timed out. 779 */ 780 static int 781 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 782 { 783 struct ahd_softc *ahd; 784 struct ahd_linux_device *dev; 785 struct scb *reset_scb; 786 u_int cdb_byte; 787 int retval = SUCCESS; 788 int paused; 789 int wait; 790 struct ahd_initiator_tinfo *tinfo; 791 struct ahd_tmode_tstate *tstate; 792 unsigned long flags; 793 DECLARE_COMPLETION_ONSTACK(done); 794 795 reset_scb = NULL; 796 paused = FALSE; 797 wait = FALSE; 798 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 799 800 scmd_printk(KERN_INFO, cmd, 801 "Attempting to queue a TARGET RESET message:"); 802 803 printk("CDB:"); 804 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 805 printk(" 0x%x", cmd->cmnd[cdb_byte]); 806 printk("\n"); 807 808 /* 809 * Determine if we currently own this command. 810 */ 811 dev = scsi_transport_device_data(cmd->device); 812 813 if (dev == NULL) { 814 /* 815 * No target device for this command exists, 816 * so we must not still own the command. 817 */ 818 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 819 return SUCCESS; 820 } 821 822 /* 823 * Generate us a new SCB 824 */ 825 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 826 if (!reset_scb) { 827 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 828 return FAILED; 829 } 830 831 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 832 cmd->device->id, &tstate); 833 reset_scb->io_ctx = cmd; 834 reset_scb->platform_data->dev = dev; 835 reset_scb->sg_count = 0; 836 ahd_set_residual(reset_scb, 0); 837 ahd_set_sense_residual(reset_scb, 0); 838 reset_scb->platform_data->xfer_len = 0; 839 reset_scb->hscb->control = 0; 840 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 841 reset_scb->hscb->lun = cmd->device->lun; 842 reset_scb->hscb->cdb_len = 0; 843 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 844 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 845 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 846 reset_scb->flags |= SCB_PACKETIZED; 847 } else { 848 reset_scb->hscb->control |= MK_MESSAGE; 849 } 850 dev->openings--; 851 dev->active++; 852 dev->commands_issued++; 853 854 ahd_lock(ahd, &flags); 855 856 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 857 ahd_queue_scb(ahd, reset_scb); 858 859 ahd->platform_data->eh_done = &done; 860 ahd_unlock(ahd, &flags); 861 862 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 863 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 864 ahd_lock(ahd, &flags); 865 ahd->platform_data->eh_done = NULL; 866 ahd_unlock(ahd, &flags); 867 printk("%s: Device reset timer expired (active %d)\n", 868 ahd_name(ahd), dev->active); 869 retval = FAILED; 870 } 871 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 872 873 return (retval); 874 } 875 876 /* 877 * Reset the SCSI bus. 878 */ 879 static int 880 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 881 { 882 struct ahd_softc *ahd; 883 int found; 884 unsigned long flags; 885 886 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 887 #ifdef AHD_DEBUG 888 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 889 printk("%s: Bus reset called for cmd %p\n", 890 ahd_name(ahd), cmd); 891 #endif 892 ahd_lock(ahd, &flags); 893 894 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 895 /*initiate reset*/TRUE); 896 ahd_unlock(ahd, &flags); 897 898 if (bootverbose) 899 printk("%s: SCSI bus reset delivered. " 900 "%d SCBs aborted.\n", ahd_name(ahd), found); 901 902 return (SUCCESS); 903 } 904 905 struct scsi_host_template aic79xx_driver_template = { 906 .module = THIS_MODULE, 907 .name = "aic79xx", 908 .proc_name = "aic79xx", 909 .show_info = ahd_linux_show_info, 910 .write_info = ahd_proc_write_seeprom, 911 .info = ahd_linux_info, 912 .queuecommand = ahd_linux_queue, 913 .eh_abort_handler = ahd_linux_abort, 914 .eh_device_reset_handler = ahd_linux_dev_reset, 915 .eh_bus_reset_handler = ahd_linux_bus_reset, 916 #if defined(__i386__) 917 .bios_param = ahd_linux_biosparam, 918 #endif 919 .can_queue = AHD_MAX_QUEUE, 920 .this_id = -1, 921 .max_sectors = 8192, 922 .cmd_per_lun = 2, 923 .slave_alloc = ahd_linux_slave_alloc, 924 .slave_configure = ahd_linux_slave_configure, 925 .target_alloc = ahd_linux_target_alloc, 926 .target_destroy = ahd_linux_target_destroy, 927 }; 928 929 /******************************** Bus DMA *************************************/ 930 int 931 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 932 bus_size_t alignment, bus_size_t boundary, 933 dma_addr_t lowaddr, dma_addr_t highaddr, 934 bus_dma_filter_t *filter, void *filterarg, 935 bus_size_t maxsize, int nsegments, 936 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 937 { 938 bus_dma_tag_t dmat; 939 940 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 941 if (dmat == NULL) 942 return (ENOMEM); 943 944 /* 945 * Linux is very simplistic about DMA memory. For now don't 946 * maintain all specification information. Once Linux supplies 947 * better facilities for doing these operations, or the 948 * needs of this particular driver change, we might need to do 949 * more here. 950 */ 951 dmat->alignment = alignment; 952 dmat->boundary = boundary; 953 dmat->maxsize = maxsize; 954 *ret_tag = dmat; 955 return (0); 956 } 957 958 void 959 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 960 { 961 kfree(dmat); 962 } 963 964 int 965 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 966 int flags, bus_dmamap_t *mapp) 967 { 968 *vaddr = pci_alloc_consistent(ahd->dev_softc, 969 dmat->maxsize, mapp); 970 if (*vaddr == NULL) 971 return (ENOMEM); 972 return(0); 973 } 974 975 void 976 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 977 void* vaddr, bus_dmamap_t map) 978 { 979 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 980 vaddr, map); 981 } 982 983 int 984 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 985 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 986 void *cb_arg, int flags) 987 { 988 /* 989 * Assume for now that this will only be used during 990 * initialization and not for per-transaction buffer mapping. 991 */ 992 bus_dma_segment_t stack_sg; 993 994 stack_sg.ds_addr = map; 995 stack_sg.ds_len = dmat->maxsize; 996 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 997 return (0); 998 } 999 1000 void 1001 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1002 { 1003 } 1004 1005 int 1006 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1007 { 1008 /* Nothing to do */ 1009 return (0); 1010 } 1011 1012 /********************* Platform Dependent Functions ***************************/ 1013 static void 1014 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1015 { 1016 1017 if ((instance >= 0) 1018 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1019 uint8_t *iocell_info; 1020 1021 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1022 iocell_info[index] = value & 0xFFFF; 1023 if (bootverbose) 1024 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1025 } 1026 } 1027 1028 static void 1029 ahd_linux_setup_tag_info_global(char *p) 1030 { 1031 int tags, i, j; 1032 1033 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1034 printk("Setting Global Tags= %d\n", tags); 1035 1036 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1037 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1038 aic79xx_tag_info[i].tag_commands[j] = tags; 1039 } 1040 } 1041 } 1042 1043 static void 1044 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1045 { 1046 1047 if ((instance >= 0) && (targ >= 0) 1048 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1049 && (targ < AHD_NUM_TARGETS)) { 1050 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1051 if (bootverbose) 1052 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1053 } 1054 } 1055 1056 static char * 1057 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1058 void (*callback)(u_long, int, int, int32_t), 1059 u_long callback_arg) 1060 { 1061 char *tok_end; 1062 char *tok_end2; 1063 int i; 1064 int instance; 1065 int targ; 1066 int done; 1067 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1068 1069 /* All options use a ':' name/arg separator */ 1070 if (*opt_arg != ':') 1071 return (opt_arg); 1072 opt_arg++; 1073 instance = -1; 1074 targ = -1; 1075 done = FALSE; 1076 /* 1077 * Restore separator that may be in 1078 * the middle of our option argument. 1079 */ 1080 tok_end = strchr(opt_arg, '\0'); 1081 if (tok_end < end) 1082 *tok_end = ','; 1083 while (!done) { 1084 switch (*opt_arg) { 1085 case '{': 1086 if (instance == -1) { 1087 instance = 0; 1088 } else { 1089 if (depth > 1) { 1090 if (targ == -1) 1091 targ = 0; 1092 } else { 1093 printk("Malformed Option %s\n", 1094 opt_name); 1095 done = TRUE; 1096 } 1097 } 1098 opt_arg++; 1099 break; 1100 case '}': 1101 if (targ != -1) 1102 targ = -1; 1103 else if (instance != -1) 1104 instance = -1; 1105 opt_arg++; 1106 break; 1107 case ',': 1108 case '.': 1109 if (instance == -1) 1110 done = TRUE; 1111 else if (targ >= 0) 1112 targ++; 1113 else if (instance >= 0) 1114 instance++; 1115 opt_arg++; 1116 break; 1117 case '\0': 1118 done = TRUE; 1119 break; 1120 default: 1121 tok_end = end; 1122 for (i = 0; tok_list[i]; i++) { 1123 tok_end2 = strchr(opt_arg, tok_list[i]); 1124 if ((tok_end2) && (tok_end2 < tok_end)) 1125 tok_end = tok_end2; 1126 } 1127 callback(callback_arg, instance, targ, 1128 simple_strtol(opt_arg, NULL, 0)); 1129 opt_arg = tok_end; 1130 break; 1131 } 1132 } 1133 return (opt_arg); 1134 } 1135 1136 /* 1137 * Handle Linux boot parameters. This routine allows for assigning a value 1138 * to a parameter with a ':' between the parameter and the value. 1139 * ie. aic79xx=stpwlev:1,extended 1140 */ 1141 static int 1142 aic79xx_setup(char *s) 1143 { 1144 int i, n; 1145 char *p; 1146 char *end; 1147 1148 static const struct { 1149 const char *name; 1150 uint32_t *flag; 1151 } options[] = { 1152 { "extended", &aic79xx_extended }, 1153 { "no_reset", &aic79xx_no_reset }, 1154 { "verbose", &aic79xx_verbose }, 1155 { "allow_memio", &aic79xx_allow_memio}, 1156 #ifdef AHD_DEBUG 1157 { "debug", &ahd_debug }, 1158 #endif 1159 { "periodic_otag", &aic79xx_periodic_otag }, 1160 { "pci_parity", &aic79xx_pci_parity }, 1161 { "seltime", &aic79xx_seltime }, 1162 { "tag_info", NULL }, 1163 { "global_tag_depth", NULL}, 1164 { "slewrate", NULL }, 1165 { "precomp", NULL }, 1166 { "amplitude", NULL }, 1167 { "slowcrc", &aic79xx_slowcrc }, 1168 }; 1169 1170 end = strchr(s, '\0'); 1171 1172 /* 1173 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1174 * will never be 0 in this case. 1175 */ 1176 n = 0; 1177 1178 while ((p = strsep(&s, ",.")) != NULL) { 1179 if (*p == '\0') 1180 continue; 1181 for (i = 0; i < ARRAY_SIZE(options); i++) { 1182 1183 n = strlen(options[i].name); 1184 if (strncmp(options[i].name, p, n) == 0) 1185 break; 1186 } 1187 if (i == ARRAY_SIZE(options)) 1188 continue; 1189 1190 if (strncmp(p, "global_tag_depth", n) == 0) { 1191 ahd_linux_setup_tag_info_global(p + n); 1192 } else if (strncmp(p, "tag_info", n) == 0) { 1193 s = ahd_parse_brace_option("tag_info", p + n, end, 1194 2, ahd_linux_setup_tag_info, 0); 1195 } else if (strncmp(p, "slewrate", n) == 0) { 1196 s = ahd_parse_brace_option("slewrate", 1197 p + n, end, 1, ahd_linux_setup_iocell_info, 1198 AIC79XX_SLEWRATE_INDEX); 1199 } else if (strncmp(p, "precomp", n) == 0) { 1200 s = ahd_parse_brace_option("precomp", 1201 p + n, end, 1, ahd_linux_setup_iocell_info, 1202 AIC79XX_PRECOMP_INDEX); 1203 } else if (strncmp(p, "amplitude", n) == 0) { 1204 s = ahd_parse_brace_option("amplitude", 1205 p + n, end, 1, ahd_linux_setup_iocell_info, 1206 AIC79XX_AMPLITUDE_INDEX); 1207 } else if (p[n] == ':') { 1208 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1209 } else if (!strncmp(p, "verbose", n)) { 1210 *(options[i].flag) = 1; 1211 } else { 1212 *(options[i].flag) ^= 0xFFFFFFFF; 1213 } 1214 } 1215 return 1; 1216 } 1217 1218 __setup("aic79xx=", aic79xx_setup); 1219 1220 uint32_t aic79xx_verbose; 1221 1222 int 1223 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1224 { 1225 char buf[80]; 1226 struct Scsi_Host *host; 1227 char *new_name; 1228 u_long s; 1229 int retval; 1230 1231 template->name = ahd->description; 1232 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1233 if (host == NULL) 1234 return (ENOMEM); 1235 1236 *((struct ahd_softc **)host->hostdata) = ahd; 1237 ahd->platform_data->host = host; 1238 host->can_queue = AHD_MAX_QUEUE; 1239 host->cmd_per_lun = 2; 1240 host->sg_tablesize = AHD_NSEG; 1241 host->this_id = ahd->our_id; 1242 host->irq = ahd->platform_data->irq; 1243 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1244 host->max_lun = AHD_NUM_LUNS; 1245 host->max_channel = 0; 1246 host->sg_tablesize = AHD_NSEG; 1247 ahd_lock(ahd, &s); 1248 ahd_set_unit(ahd, ahd_linux_unit++); 1249 ahd_unlock(ahd, &s); 1250 sprintf(buf, "scsi%d", host->host_no); 1251 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1252 if (new_name != NULL) { 1253 strcpy(new_name, buf); 1254 ahd_set_name(ahd, new_name); 1255 } 1256 host->unique_id = ahd->unit; 1257 ahd_linux_initialize_scsi_bus(ahd); 1258 ahd_intr_enable(ahd, TRUE); 1259 1260 host->transportt = ahd_linux_transport_template; 1261 1262 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1263 if (retval) { 1264 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1265 scsi_host_put(host); 1266 return retval; 1267 } 1268 1269 scsi_scan_host(host); 1270 return 0; 1271 } 1272 1273 /* 1274 * Place the SCSI bus into a known state by either resetting it, 1275 * or forcing transfer negotiations on the next command to any 1276 * target. 1277 */ 1278 static void 1279 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1280 { 1281 u_int target_id; 1282 u_int numtarg; 1283 unsigned long s; 1284 1285 target_id = 0; 1286 numtarg = 0; 1287 1288 if (aic79xx_no_reset != 0) 1289 ahd->flags &= ~AHD_RESET_BUS_A; 1290 1291 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1292 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1293 else 1294 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1295 1296 ahd_lock(ahd, &s); 1297 1298 /* 1299 * Force negotiation to async for all targets that 1300 * will not see an initial bus reset. 1301 */ 1302 for (; target_id < numtarg; target_id++) { 1303 struct ahd_devinfo devinfo; 1304 struct ahd_initiator_tinfo *tinfo; 1305 struct ahd_tmode_tstate *tstate; 1306 1307 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1308 target_id, &tstate); 1309 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1310 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1311 ahd_update_neg_request(ahd, &devinfo, tstate, 1312 tinfo, AHD_NEG_ALWAYS); 1313 } 1314 ahd_unlock(ahd, &s); 1315 /* Give the bus some time to recover */ 1316 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1317 ahd_freeze_simq(ahd); 1318 msleep(AIC79XX_RESET_DELAY); 1319 ahd_release_simq(ahd); 1320 } 1321 } 1322 1323 int 1324 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1325 { 1326 ahd->platform_data = 1327 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1328 if (ahd->platform_data == NULL) 1329 return (ENOMEM); 1330 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1331 ahd_lockinit(ahd); 1332 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1333 return (0); 1334 } 1335 1336 void 1337 ahd_platform_free(struct ahd_softc *ahd) 1338 { 1339 struct scsi_target *starget; 1340 int i; 1341 1342 if (ahd->platform_data != NULL) { 1343 /* destroy all of the device and target objects */ 1344 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1345 starget = ahd->platform_data->starget[i]; 1346 if (starget != NULL) { 1347 ahd->platform_data->starget[i] = NULL; 1348 } 1349 } 1350 1351 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1352 free_irq(ahd->platform_data->irq, ahd); 1353 if (ahd->tags[0] == BUS_SPACE_PIO 1354 && ahd->bshs[0].ioport != 0) 1355 release_region(ahd->bshs[0].ioport, 256); 1356 if (ahd->tags[1] == BUS_SPACE_PIO 1357 && ahd->bshs[1].ioport != 0) 1358 release_region(ahd->bshs[1].ioport, 256); 1359 if (ahd->tags[0] == BUS_SPACE_MEMIO 1360 && ahd->bshs[0].maddr != NULL) { 1361 iounmap(ahd->bshs[0].maddr); 1362 release_mem_region(ahd->platform_data->mem_busaddr, 1363 0x1000); 1364 } 1365 if (ahd->platform_data->host) 1366 scsi_host_put(ahd->platform_data->host); 1367 1368 kfree(ahd->platform_data); 1369 } 1370 } 1371 1372 void 1373 ahd_platform_init(struct ahd_softc *ahd) 1374 { 1375 /* 1376 * Lookup and commit any modified IO Cell options. 1377 */ 1378 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1379 const struct ahd_linux_iocell_opts *iocell_opts; 1380 1381 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1382 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1383 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1384 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1385 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1386 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1387 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1388 } 1389 1390 } 1391 1392 void 1393 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1394 { 1395 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1396 SCB_GET_CHANNEL(ahd, scb), 1397 SCB_GET_LUN(scb), SCB_LIST_NULL, 1398 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1399 } 1400 1401 void 1402 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1403 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1404 { 1405 struct ahd_linux_device *dev; 1406 int was_queuing; 1407 int now_queuing; 1408 1409 if (sdev == NULL) 1410 return; 1411 1412 dev = scsi_transport_device_data(sdev); 1413 1414 if (dev == NULL) 1415 return; 1416 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1417 switch (alg) { 1418 default: 1419 case AHD_QUEUE_NONE: 1420 now_queuing = 0; 1421 break; 1422 case AHD_QUEUE_BASIC: 1423 now_queuing = AHD_DEV_Q_BASIC; 1424 break; 1425 case AHD_QUEUE_TAGGED: 1426 now_queuing = AHD_DEV_Q_TAGGED; 1427 break; 1428 } 1429 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1430 && (was_queuing != now_queuing) 1431 && (dev->active != 0)) { 1432 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1433 dev->qfrozen++; 1434 } 1435 1436 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1437 if (now_queuing) { 1438 u_int usertags; 1439 1440 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1441 if (!was_queuing) { 1442 /* 1443 * Start out aggressively and allow our 1444 * dynamic queue depth algorithm to take 1445 * care of the rest. 1446 */ 1447 dev->maxtags = usertags; 1448 dev->openings = dev->maxtags - dev->active; 1449 } 1450 if (dev->maxtags == 0) { 1451 /* 1452 * Queueing is disabled by the user. 1453 */ 1454 dev->openings = 1; 1455 } else if (alg == AHD_QUEUE_TAGGED) { 1456 dev->flags |= AHD_DEV_Q_TAGGED; 1457 if (aic79xx_periodic_otag != 0) 1458 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1459 } else 1460 dev->flags |= AHD_DEV_Q_BASIC; 1461 } else { 1462 /* We can only have one opening. */ 1463 dev->maxtags = 0; 1464 dev->openings = 1 - dev->active; 1465 } 1466 1467 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1468 case AHD_DEV_Q_BASIC: 1469 case AHD_DEV_Q_TAGGED: 1470 scsi_change_queue_depth(sdev, 1471 dev->openings + dev->active); 1472 break; 1473 default: 1474 /* 1475 * We allow the OS to queue 2 untagged transactions to 1476 * us at any time even though we can only execute them 1477 * serially on the controller/device. This should 1478 * remove some latency. 1479 */ 1480 scsi_change_queue_depth(sdev, 1); 1481 break; 1482 } 1483 } 1484 1485 int 1486 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1487 int lun, u_int tag, role_t role, uint32_t status) 1488 { 1489 return 0; 1490 } 1491 1492 static u_int 1493 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1494 { 1495 static int warned_user; 1496 u_int tags; 1497 1498 tags = 0; 1499 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1500 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1501 1502 if (warned_user == 0) { 1503 printk(KERN_WARNING 1504 "aic79xx: WARNING: Insufficient tag_info instances\n" 1505 "aic79xx: for installed controllers. Using defaults\n" 1506 "aic79xx: Please update the aic79xx_tag_info array in\n" 1507 "aic79xx: the aic79xx_osm.c source file.\n"); 1508 warned_user++; 1509 } 1510 tags = AHD_MAX_QUEUE; 1511 } else { 1512 adapter_tag_info_t *tag_info; 1513 1514 tag_info = &aic79xx_tag_info[ahd->unit]; 1515 tags = tag_info->tag_commands[devinfo->target_offset]; 1516 if (tags > AHD_MAX_QUEUE) 1517 tags = AHD_MAX_QUEUE; 1518 } 1519 } 1520 return (tags); 1521 } 1522 1523 /* 1524 * Determines the queue depth for a given device. 1525 */ 1526 static void 1527 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1528 { 1529 struct ahd_devinfo devinfo; 1530 u_int tags; 1531 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1532 1533 ahd_compile_devinfo(&devinfo, 1534 ahd->our_id, 1535 sdev->sdev_target->id, sdev->lun, 1536 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1537 ROLE_INITIATOR); 1538 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1539 if (tags != 0 && sdev->tagged_supported != 0) { 1540 1541 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1542 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1543 devinfo.lun, AC_TRANSFER_NEG); 1544 ahd_print_devinfo(ahd, &devinfo); 1545 printk("Tagged Queuing enabled. Depth %d\n", tags); 1546 } else { 1547 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1548 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1549 devinfo.lun, AC_TRANSFER_NEG); 1550 } 1551 } 1552 1553 static int 1554 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1555 struct scsi_cmnd *cmd) 1556 { 1557 struct scb *scb; 1558 struct hardware_scb *hscb; 1559 struct ahd_initiator_tinfo *tinfo; 1560 struct ahd_tmode_tstate *tstate; 1561 u_int col_idx; 1562 uint16_t mask; 1563 unsigned long flags; 1564 int nseg; 1565 1566 nseg = scsi_dma_map(cmd); 1567 if (nseg < 0) 1568 return SCSI_MLQUEUE_HOST_BUSY; 1569 1570 ahd_lock(ahd, &flags); 1571 1572 /* 1573 * Get an scb to use. 1574 */ 1575 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1576 cmd->device->id, &tstate); 1577 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1578 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1579 col_idx = AHD_NEVER_COL_IDX; 1580 } else { 1581 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1582 cmd->device->lun); 1583 } 1584 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1585 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1586 ahd_unlock(ahd, &flags); 1587 scsi_dma_unmap(cmd); 1588 return SCSI_MLQUEUE_HOST_BUSY; 1589 } 1590 1591 scb->io_ctx = cmd; 1592 scb->platform_data->dev = dev; 1593 hscb = scb->hscb; 1594 cmd->host_scribble = (char *)scb; 1595 1596 /* 1597 * Fill out basics of the HSCB. 1598 */ 1599 hscb->control = 0; 1600 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1601 hscb->lun = cmd->device->lun; 1602 scb->hscb->task_management = 0; 1603 mask = SCB_GET_TARGET_MASK(ahd, scb); 1604 1605 if ((ahd->user_discenable & mask) != 0) 1606 hscb->control |= DISCENB; 1607 1608 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1609 scb->flags |= SCB_PACKETIZED; 1610 1611 if ((tstate->auto_negotiate & mask) != 0) { 1612 scb->flags |= SCB_AUTO_NEGOTIATE; 1613 scb->hscb->control |= MK_MESSAGE; 1614 } 1615 1616 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1617 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1618 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1619 hscb->control |= MSG_ORDERED_TASK; 1620 dev->commands_since_idle_or_otag = 0; 1621 } else { 1622 hscb->control |= MSG_SIMPLE_TASK; 1623 } 1624 } 1625 1626 hscb->cdb_len = cmd->cmd_len; 1627 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1628 1629 scb->platform_data->xfer_len = 0; 1630 ahd_set_residual(scb, 0); 1631 ahd_set_sense_residual(scb, 0); 1632 scb->sg_count = 0; 1633 1634 if (nseg > 0) { 1635 void *sg = scb->sg_list; 1636 struct scatterlist *cur_seg; 1637 int i; 1638 1639 scb->platform_data->xfer_len = 0; 1640 1641 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1642 dma_addr_t addr; 1643 bus_size_t len; 1644 1645 addr = sg_dma_address(cur_seg); 1646 len = sg_dma_len(cur_seg); 1647 scb->platform_data->xfer_len += len; 1648 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1649 i == (nseg - 1)); 1650 } 1651 } 1652 1653 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1654 dev->openings--; 1655 dev->active++; 1656 dev->commands_issued++; 1657 1658 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1659 dev->commands_since_idle_or_otag++; 1660 scb->flags |= SCB_ACTIVE; 1661 ahd_queue_scb(ahd, scb); 1662 1663 ahd_unlock(ahd, &flags); 1664 1665 return 0; 1666 } 1667 1668 /* 1669 * SCSI controller interrupt handler. 1670 */ 1671 irqreturn_t 1672 ahd_linux_isr(int irq, void *dev_id) 1673 { 1674 struct ahd_softc *ahd; 1675 u_long flags; 1676 int ours; 1677 1678 ahd = (struct ahd_softc *) dev_id; 1679 ahd_lock(ahd, &flags); 1680 ours = ahd_intr(ahd); 1681 ahd_unlock(ahd, &flags); 1682 return IRQ_RETVAL(ours); 1683 } 1684 1685 void 1686 ahd_send_async(struct ahd_softc *ahd, char channel, 1687 u_int target, u_int lun, ac_code code) 1688 { 1689 switch (code) { 1690 case AC_TRANSFER_NEG: 1691 { 1692 struct scsi_target *starget; 1693 struct ahd_initiator_tinfo *tinfo; 1694 struct ahd_tmode_tstate *tstate; 1695 unsigned int target_ppr_options; 1696 1697 BUG_ON(target == CAM_TARGET_WILDCARD); 1698 1699 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1700 target, &tstate); 1701 1702 /* 1703 * Don't bother reporting results while 1704 * negotiations are still pending. 1705 */ 1706 if (tinfo->curr.period != tinfo->goal.period 1707 || tinfo->curr.width != tinfo->goal.width 1708 || tinfo->curr.offset != tinfo->goal.offset 1709 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1710 if (bootverbose == 0) 1711 break; 1712 1713 /* 1714 * Don't bother reporting results that 1715 * are identical to those last reported. 1716 */ 1717 starget = ahd->platform_data->starget[target]; 1718 if (starget == NULL) 1719 break; 1720 1721 target_ppr_options = 1722 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1723 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1724 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1725 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1726 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1727 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1728 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1729 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1730 1731 if (tinfo->curr.period == spi_period(starget) 1732 && tinfo->curr.width == spi_width(starget) 1733 && tinfo->curr.offset == spi_offset(starget) 1734 && tinfo->curr.ppr_options == target_ppr_options) 1735 if (bootverbose == 0) 1736 break; 1737 1738 spi_period(starget) = tinfo->curr.period; 1739 spi_width(starget) = tinfo->curr.width; 1740 spi_offset(starget) = tinfo->curr.offset; 1741 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1742 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1743 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1744 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1745 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1746 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1747 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1748 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1749 spi_display_xfer_agreement(starget); 1750 break; 1751 } 1752 case AC_SENT_BDR: 1753 { 1754 WARN_ON(lun != CAM_LUN_WILDCARD); 1755 scsi_report_device_reset(ahd->platform_data->host, 1756 channel - 'A', target); 1757 break; 1758 } 1759 case AC_BUS_RESET: 1760 if (ahd->platform_data->host != NULL) { 1761 scsi_report_bus_reset(ahd->platform_data->host, 1762 channel - 'A'); 1763 } 1764 break; 1765 default: 1766 panic("ahd_send_async: Unexpected async event"); 1767 } 1768 } 1769 1770 /* 1771 * Calls the higher level scsi done function and frees the scb. 1772 */ 1773 void 1774 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1775 { 1776 struct scsi_cmnd *cmd; 1777 struct ahd_linux_device *dev; 1778 1779 if ((scb->flags & SCB_ACTIVE) == 0) { 1780 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1781 ahd_dump_card_state(ahd); 1782 panic("Stopping for safety"); 1783 } 1784 LIST_REMOVE(scb, pending_links); 1785 cmd = scb->io_ctx; 1786 dev = scb->platform_data->dev; 1787 dev->active--; 1788 dev->openings++; 1789 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1790 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1791 dev->qfrozen--; 1792 } 1793 ahd_linux_unmap_scb(ahd, scb); 1794 1795 /* 1796 * Guard against stale sense data. 1797 * The Linux mid-layer assumes that sense 1798 * was retrieved anytime the first byte of 1799 * the sense buffer looks "sane". 1800 */ 1801 cmd->sense_buffer[0] = 0; 1802 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1803 uint32_t amount_xferred; 1804 1805 amount_xferred = 1806 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1807 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1808 #ifdef AHD_DEBUG 1809 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1810 ahd_print_path(ahd, scb); 1811 printk("Set CAM_UNCOR_PARITY\n"); 1812 } 1813 #endif 1814 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1815 #ifdef AHD_REPORT_UNDERFLOWS 1816 /* 1817 * This code is disabled by default as some 1818 * clients of the SCSI system do not properly 1819 * initialize the underflow parameter. This 1820 * results in spurious termination of commands 1821 * that complete as expected (e.g. underflow is 1822 * allowed as command can return variable amounts 1823 * of data. 1824 */ 1825 } else if (amount_xferred < scb->io_ctx->underflow) { 1826 u_int i; 1827 1828 ahd_print_path(ahd, scb); 1829 printk("CDB:"); 1830 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1831 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1832 printk("\n"); 1833 ahd_print_path(ahd, scb); 1834 printk("Saw underflow (%ld of %ld bytes). " 1835 "Treated as error\n", 1836 ahd_get_residual(scb), 1837 ahd_get_transfer_length(scb)); 1838 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1839 #endif 1840 } else { 1841 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1842 } 1843 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1844 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1845 } 1846 1847 if (dev->openings == 1 1848 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1849 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1850 dev->tag_success_count++; 1851 /* 1852 * Some devices deal with temporary internal resource 1853 * shortages by returning queue full. When the queue 1854 * full occurrs, we throttle back. Slowly try to get 1855 * back to our previous queue depth. 1856 */ 1857 if ((dev->openings + dev->active) < dev->maxtags 1858 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1859 dev->tag_success_count = 0; 1860 dev->openings++; 1861 } 1862 1863 if (dev->active == 0) 1864 dev->commands_since_idle_or_otag = 0; 1865 1866 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1867 printk("Recovery SCB completes\n"); 1868 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1869 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1870 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1871 1872 if (ahd->platform_data->eh_done) 1873 complete(ahd->platform_data->eh_done); 1874 } 1875 1876 ahd_free_scb(ahd, scb); 1877 ahd_linux_queue_cmd_complete(ahd, cmd); 1878 } 1879 1880 static void 1881 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1882 struct scsi_device *sdev, struct scb *scb) 1883 { 1884 struct ahd_devinfo devinfo; 1885 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1886 1887 ahd_compile_devinfo(&devinfo, 1888 ahd->our_id, 1889 sdev->sdev_target->id, sdev->lun, 1890 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1891 ROLE_INITIATOR); 1892 1893 /* 1894 * We don't currently trust the mid-layer to 1895 * properly deal with queue full or busy. So, 1896 * when one occurs, we tell the mid-layer to 1897 * unconditionally requeue the command to us 1898 * so that we can retry it ourselves. We also 1899 * implement our own throttling mechanism so 1900 * we don't clobber the device with too many 1901 * commands. 1902 */ 1903 switch (ahd_get_scsi_status(scb)) { 1904 default: 1905 break; 1906 case SCSI_STATUS_CHECK_COND: 1907 case SCSI_STATUS_CMD_TERMINATED: 1908 { 1909 struct scsi_cmnd *cmd; 1910 1911 /* 1912 * Copy sense information to the OS's cmd 1913 * structure if it is available. 1914 */ 1915 cmd = scb->io_ctx; 1916 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1917 struct scsi_status_iu_header *siu; 1918 u_int sense_size; 1919 u_int sense_offset; 1920 1921 if (scb->flags & SCB_SENSE) { 1922 sense_size = min(sizeof(struct scsi_sense_data) 1923 - ahd_get_sense_residual(scb), 1924 (u_long)SCSI_SENSE_BUFFERSIZE); 1925 sense_offset = 0; 1926 } else { 1927 /* 1928 * Copy only the sense data into the provided 1929 * buffer. 1930 */ 1931 siu = (struct scsi_status_iu_header *) 1932 scb->sense_data; 1933 sense_size = min_t(size_t, 1934 scsi_4btoul(siu->sense_length), 1935 SCSI_SENSE_BUFFERSIZE); 1936 sense_offset = SIU_SENSE_OFFSET(siu); 1937 } 1938 1939 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1940 memcpy(cmd->sense_buffer, 1941 ahd_get_sense_buf(ahd, scb) 1942 + sense_offset, sense_size); 1943 cmd->result |= (DRIVER_SENSE << 24); 1944 1945 #ifdef AHD_DEBUG 1946 if (ahd_debug & AHD_SHOW_SENSE) { 1947 int i; 1948 1949 printk("Copied %d bytes of sense data at %d:", 1950 sense_size, sense_offset); 1951 for (i = 0; i < sense_size; i++) { 1952 if ((i & 0xF) == 0) 1953 printk("\n"); 1954 printk("0x%x ", cmd->sense_buffer[i]); 1955 } 1956 printk("\n"); 1957 } 1958 #endif 1959 } 1960 break; 1961 } 1962 case SCSI_STATUS_QUEUE_FULL: 1963 /* 1964 * By the time the core driver has returned this 1965 * command, all other commands that were queued 1966 * to us but not the device have been returned. 1967 * This ensures that dev->active is equal to 1968 * the number of commands actually queued to 1969 * the device. 1970 */ 1971 dev->tag_success_count = 0; 1972 if (dev->active != 0) { 1973 /* 1974 * Drop our opening count to the number 1975 * of commands currently outstanding. 1976 */ 1977 dev->openings = 0; 1978 #ifdef AHD_DEBUG 1979 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1980 ahd_print_path(ahd, scb); 1981 printk("Dropping tag count to %d\n", 1982 dev->active); 1983 } 1984 #endif 1985 if (dev->active == dev->tags_on_last_queuefull) { 1986 1987 dev->last_queuefull_same_count++; 1988 /* 1989 * If we repeatedly see a queue full 1990 * at the same queue depth, this 1991 * device has a fixed number of tag 1992 * slots. Lock in this tag depth 1993 * so we stop seeing queue fulls from 1994 * this device. 1995 */ 1996 if (dev->last_queuefull_same_count 1997 == AHD_LOCK_TAGS_COUNT) { 1998 dev->maxtags = dev->active; 1999 ahd_print_path(ahd, scb); 2000 printk("Locking max tag count at %d\n", 2001 dev->active); 2002 } 2003 } else { 2004 dev->tags_on_last_queuefull = dev->active; 2005 dev->last_queuefull_same_count = 0; 2006 } 2007 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2008 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 2009 ahd_platform_set_tags(ahd, sdev, &devinfo, 2010 (dev->flags & AHD_DEV_Q_BASIC) 2011 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2012 break; 2013 } 2014 /* 2015 * Drop down to a single opening, and treat this 2016 * as if the target returned BUSY SCSI status. 2017 */ 2018 dev->openings = 1; 2019 ahd_platform_set_tags(ahd, sdev, &devinfo, 2020 (dev->flags & AHD_DEV_Q_BASIC) 2021 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2022 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2023 } 2024 } 2025 2026 static void 2027 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2028 { 2029 int status; 2030 int new_status = DID_OK; 2031 int do_fallback = 0; 2032 int scsi_status; 2033 2034 /* 2035 * Map CAM error codes into Linux Error codes. We 2036 * avoid the conversion so that the DV code has the 2037 * full error information available when making 2038 * state change decisions. 2039 */ 2040 2041 status = ahd_cmd_get_transaction_status(cmd); 2042 switch (status) { 2043 case CAM_REQ_INPROG: 2044 case CAM_REQ_CMP: 2045 new_status = DID_OK; 2046 break; 2047 case CAM_AUTOSENSE_FAIL: 2048 new_status = DID_ERROR; 2049 /* Fallthrough */ 2050 case CAM_SCSI_STATUS_ERROR: 2051 scsi_status = ahd_cmd_get_scsi_status(cmd); 2052 2053 switch(scsi_status) { 2054 case SCSI_STATUS_CMD_TERMINATED: 2055 case SCSI_STATUS_CHECK_COND: 2056 if ((cmd->result >> 24) != DRIVER_SENSE) { 2057 do_fallback = 1; 2058 } else { 2059 struct scsi_sense_data *sense; 2060 2061 sense = (struct scsi_sense_data *) 2062 cmd->sense_buffer; 2063 if (sense->extra_len >= 5 && 2064 (sense->add_sense_code == 0x47 2065 || sense->add_sense_code == 0x48)) 2066 do_fallback = 1; 2067 } 2068 break; 2069 default: 2070 break; 2071 } 2072 break; 2073 case CAM_REQ_ABORTED: 2074 new_status = DID_ABORT; 2075 break; 2076 case CAM_BUSY: 2077 new_status = DID_BUS_BUSY; 2078 break; 2079 case CAM_REQ_INVALID: 2080 case CAM_PATH_INVALID: 2081 new_status = DID_BAD_TARGET; 2082 break; 2083 case CAM_SEL_TIMEOUT: 2084 new_status = DID_NO_CONNECT; 2085 break; 2086 case CAM_SCSI_BUS_RESET: 2087 case CAM_BDR_SENT: 2088 new_status = DID_RESET; 2089 break; 2090 case CAM_UNCOR_PARITY: 2091 new_status = DID_PARITY; 2092 do_fallback = 1; 2093 break; 2094 case CAM_CMD_TIMEOUT: 2095 new_status = DID_TIME_OUT; 2096 do_fallback = 1; 2097 break; 2098 case CAM_REQ_CMP_ERR: 2099 case CAM_UNEXP_BUSFREE: 2100 case CAM_DATA_RUN_ERR: 2101 new_status = DID_ERROR; 2102 do_fallback = 1; 2103 break; 2104 case CAM_UA_ABORT: 2105 case CAM_NO_HBA: 2106 case CAM_SEQUENCE_FAIL: 2107 case CAM_CCB_LEN_ERR: 2108 case CAM_PROVIDE_FAIL: 2109 case CAM_REQ_TERMIO: 2110 case CAM_UNREC_HBA_ERROR: 2111 case CAM_REQ_TOO_BIG: 2112 new_status = DID_ERROR; 2113 break; 2114 case CAM_REQUEUE_REQ: 2115 new_status = DID_REQUEUE; 2116 break; 2117 default: 2118 /* We should never get here */ 2119 new_status = DID_ERROR; 2120 break; 2121 } 2122 2123 if (do_fallback) { 2124 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2125 ahd_name(ahd), status, cmd->device->channel, 2126 cmd->device->id, (u8)cmd->device->lun); 2127 } 2128 2129 ahd_cmd_set_transaction_status(cmd, new_status); 2130 2131 cmd->scsi_done(cmd); 2132 } 2133 2134 static void 2135 ahd_freeze_simq(struct ahd_softc *ahd) 2136 { 2137 scsi_block_requests(ahd->platform_data->host); 2138 } 2139 2140 static void 2141 ahd_release_simq(struct ahd_softc *ahd) 2142 { 2143 scsi_unblock_requests(ahd->platform_data->host); 2144 } 2145 2146 static int 2147 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2148 { 2149 struct ahd_softc *ahd; 2150 struct ahd_linux_device *dev; 2151 struct scb *pending_scb; 2152 u_int saved_scbptr; 2153 u_int active_scbptr; 2154 u_int last_phase; 2155 u_int saved_scsiid; 2156 u_int cdb_byte; 2157 int retval; 2158 int was_paused; 2159 int paused; 2160 int wait; 2161 int disconnected; 2162 ahd_mode_state saved_modes; 2163 unsigned long flags; 2164 2165 pending_scb = NULL; 2166 paused = FALSE; 2167 wait = FALSE; 2168 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2169 2170 scmd_printk(KERN_INFO, cmd, 2171 "Attempting to queue an ABORT message:"); 2172 2173 printk("CDB:"); 2174 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2175 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2176 printk("\n"); 2177 2178 ahd_lock(ahd, &flags); 2179 2180 /* 2181 * First determine if we currently own this command. 2182 * Start by searching the device queue. If not found 2183 * there, check the pending_scb list. If not found 2184 * at all, and the system wanted us to just abort the 2185 * command, return success. 2186 */ 2187 dev = scsi_transport_device_data(cmd->device); 2188 2189 if (dev == NULL) { 2190 /* 2191 * No target device for this command exists, 2192 * so we must not still own the command. 2193 */ 2194 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2195 retval = SUCCESS; 2196 goto no_cmd; 2197 } 2198 2199 /* 2200 * See if we can find a matching cmd in the pending list. 2201 */ 2202 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2203 if (pending_scb->io_ctx == cmd) 2204 break; 2205 } 2206 2207 if (pending_scb == NULL) { 2208 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2209 goto no_cmd; 2210 } 2211 2212 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2213 /* 2214 * We can't queue two recovery actions using the same SCB 2215 */ 2216 retval = FAILED; 2217 goto done; 2218 } 2219 2220 /* 2221 * Ensure that the card doesn't do anything 2222 * behind our back. Also make sure that we 2223 * didn't "just" miss an interrupt that would 2224 * affect this cmd. 2225 */ 2226 was_paused = ahd_is_paused(ahd); 2227 ahd_pause_and_flushwork(ahd); 2228 paused = TRUE; 2229 2230 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2231 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2232 goto no_cmd; 2233 } 2234 2235 printk("%s: At time of recovery, card was %spaused\n", 2236 ahd_name(ahd), was_paused ? "" : "not "); 2237 ahd_dump_card_state(ahd); 2238 2239 disconnected = TRUE; 2240 if (ahd_search_qinfifo(ahd, cmd->device->id, 2241 cmd->device->channel + 'A', 2242 cmd->device->lun, 2243 pending_scb->hscb->tag, 2244 ROLE_INITIATOR, CAM_REQ_ABORTED, 2245 SEARCH_COMPLETE) > 0) { 2246 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2247 ahd_name(ahd), cmd->device->channel, 2248 cmd->device->id, (u8)cmd->device->lun); 2249 retval = SUCCESS; 2250 goto done; 2251 } 2252 2253 saved_modes = ahd_save_modes(ahd); 2254 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2255 last_phase = ahd_inb(ahd, LASTPHASE); 2256 saved_scbptr = ahd_get_scbptr(ahd); 2257 active_scbptr = saved_scbptr; 2258 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2259 struct scb *bus_scb; 2260 2261 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2262 if (bus_scb == pending_scb) 2263 disconnected = FALSE; 2264 } 2265 2266 /* 2267 * At this point, pending_scb is the scb associated with the 2268 * passed in command. That command is currently active on the 2269 * bus or is in the disconnected state. 2270 */ 2271 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2272 if (last_phase != P_BUSFREE 2273 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2274 2275 /* 2276 * We're active on the bus, so assert ATN 2277 * and hope that the target responds. 2278 */ 2279 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2280 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2281 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2282 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2283 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2284 wait = TRUE; 2285 } else if (disconnected) { 2286 2287 /* 2288 * Actually re-queue this SCB in an attempt 2289 * to select the device before it reconnects. 2290 */ 2291 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2292 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2293 pending_scb->hscb->cdb_len = 0; 2294 pending_scb->hscb->task_attribute = 0; 2295 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2296 2297 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2298 /* 2299 * Mark the SCB has having an outstanding 2300 * task management function. Should the command 2301 * complete normally before the task management 2302 * function can be sent, the host will be notified 2303 * to abort our requeued SCB. 2304 */ 2305 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2306 pending_scb->hscb->task_management); 2307 } else { 2308 /* 2309 * If non-packetized, set the MK_MESSAGE control 2310 * bit indicating that we desire to send a message. 2311 * We also set the disconnected flag since there is 2312 * no guarantee that our SCB control byte matches 2313 * the version on the card. We don't want the 2314 * sequencer to abort the command thinking an 2315 * unsolicited reselection occurred. 2316 */ 2317 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2318 2319 /* 2320 * The sequencer will never re-reference the 2321 * in-core SCB. To make sure we are notified 2322 * during reselection, set the MK_MESSAGE flag in 2323 * the card's copy of the SCB. 2324 */ 2325 ahd_outb(ahd, SCB_CONTROL, 2326 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2327 } 2328 2329 /* 2330 * Clear out any entries in the QINFIFO first 2331 * so we are the next SCB for this target 2332 * to run. 2333 */ 2334 ahd_search_qinfifo(ahd, cmd->device->id, 2335 cmd->device->channel + 'A', cmd->device->lun, 2336 SCB_LIST_NULL, ROLE_INITIATOR, 2337 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2338 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2339 ahd_set_scbptr(ahd, saved_scbptr); 2340 ahd_print_path(ahd, pending_scb); 2341 printk("Device is disconnected, re-queuing SCB\n"); 2342 wait = TRUE; 2343 } else { 2344 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2345 retval = FAILED; 2346 goto done; 2347 } 2348 2349 no_cmd: 2350 /* 2351 * Our assumption is that if we don't have the command, no 2352 * recovery action was required, so we return success. Again, 2353 * the semantics of the mid-layer recovery engine are not 2354 * well defined, so this may change in time. 2355 */ 2356 retval = SUCCESS; 2357 done: 2358 if (paused) 2359 ahd_unpause(ahd); 2360 if (wait) { 2361 DECLARE_COMPLETION_ONSTACK(done); 2362 2363 ahd->platform_data->eh_done = &done; 2364 ahd_unlock(ahd, &flags); 2365 2366 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2367 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2368 ahd_lock(ahd, &flags); 2369 ahd->platform_data->eh_done = NULL; 2370 ahd_unlock(ahd, &flags); 2371 printk("%s: Timer Expired (active %d)\n", 2372 ahd_name(ahd), dev->active); 2373 retval = FAILED; 2374 } 2375 printk("Recovery code awake\n"); 2376 } else 2377 ahd_unlock(ahd, &flags); 2378 2379 if (retval != SUCCESS) 2380 printk("%s: Command abort returning 0x%x\n", 2381 ahd_name(ahd), retval); 2382 2383 return retval; 2384 } 2385 2386 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2387 { 2388 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2389 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2390 struct ahd_devinfo devinfo; 2391 unsigned long flags; 2392 2393 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2394 starget->channel + 'A', ROLE_INITIATOR); 2395 ahd_lock(ahd, &flags); 2396 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2397 ahd_unlock(ahd, &flags); 2398 } 2399 2400 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2401 { 2402 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2403 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2404 struct ahd_tmode_tstate *tstate; 2405 struct ahd_initiator_tinfo *tinfo 2406 = ahd_fetch_transinfo(ahd, 2407 starget->channel + 'A', 2408 shost->this_id, starget->id, &tstate); 2409 struct ahd_devinfo devinfo; 2410 unsigned int ppr_options = tinfo->goal.ppr_options; 2411 unsigned int dt; 2412 unsigned long flags; 2413 unsigned long offset = tinfo->goal.offset; 2414 2415 #ifdef AHD_DEBUG 2416 if ((ahd_debug & AHD_SHOW_DV) != 0) 2417 printk("%s: set period to %d\n", ahd_name(ahd), period); 2418 #endif 2419 if (offset == 0) 2420 offset = MAX_OFFSET; 2421 2422 if (period < 8) 2423 period = 8; 2424 if (period < 10) { 2425 if (spi_max_width(starget)) { 2426 ppr_options |= MSG_EXT_PPR_DT_REQ; 2427 if (period == 8) 2428 ppr_options |= MSG_EXT_PPR_IU_REQ; 2429 } else 2430 period = 10; 2431 } 2432 2433 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2434 2435 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2436 starget->channel + 'A', ROLE_INITIATOR); 2437 2438 /* all PPR requests apart from QAS require wide transfers */ 2439 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2440 if (spi_width(starget) == 0) 2441 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2442 } 2443 2444 ahd_find_syncrate(ahd, &period, &ppr_options, 2445 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2446 2447 ahd_lock(ahd, &flags); 2448 ahd_set_syncrate(ahd, &devinfo, period, offset, 2449 ppr_options, AHD_TRANS_GOAL, FALSE); 2450 ahd_unlock(ahd, &flags); 2451 } 2452 2453 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2454 { 2455 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2456 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2457 struct ahd_tmode_tstate *tstate; 2458 struct ahd_initiator_tinfo *tinfo 2459 = ahd_fetch_transinfo(ahd, 2460 starget->channel + 'A', 2461 shost->this_id, starget->id, &tstate); 2462 struct ahd_devinfo devinfo; 2463 unsigned int ppr_options = 0; 2464 unsigned int period = 0; 2465 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2466 unsigned long flags; 2467 2468 #ifdef AHD_DEBUG 2469 if ((ahd_debug & AHD_SHOW_DV) != 0) 2470 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2471 #endif 2472 2473 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2474 starget->channel + 'A', ROLE_INITIATOR); 2475 if (offset != 0) { 2476 period = tinfo->goal.period; 2477 ppr_options = tinfo->goal.ppr_options; 2478 ahd_find_syncrate(ahd, &period, &ppr_options, 2479 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2480 } 2481 2482 ahd_lock(ahd, &flags); 2483 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2484 AHD_TRANS_GOAL, FALSE); 2485 ahd_unlock(ahd, &flags); 2486 } 2487 2488 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2489 { 2490 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2491 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2492 struct ahd_tmode_tstate *tstate; 2493 struct ahd_initiator_tinfo *tinfo 2494 = ahd_fetch_transinfo(ahd, 2495 starget->channel + 'A', 2496 shost->this_id, starget->id, &tstate); 2497 struct ahd_devinfo devinfo; 2498 unsigned int ppr_options = tinfo->goal.ppr_options 2499 & ~MSG_EXT_PPR_DT_REQ; 2500 unsigned int period = tinfo->goal.period; 2501 unsigned int width = tinfo->goal.width; 2502 unsigned long flags; 2503 2504 #ifdef AHD_DEBUG 2505 if ((ahd_debug & AHD_SHOW_DV) != 0) 2506 printk("%s: %s DT\n", ahd_name(ahd), 2507 dt ? "enabling" : "disabling"); 2508 #endif 2509 if (dt && spi_max_width(starget)) { 2510 ppr_options |= MSG_EXT_PPR_DT_REQ; 2511 if (!width) 2512 ahd_linux_set_width(starget, 1); 2513 } else { 2514 if (period <= 9) 2515 period = 10; /* If resetting DT, period must be >= 25ns */ 2516 /* IU is invalid without DT set */ 2517 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2518 } 2519 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2520 starget->channel + 'A', ROLE_INITIATOR); 2521 ahd_find_syncrate(ahd, &period, &ppr_options, 2522 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2523 2524 ahd_lock(ahd, &flags); 2525 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2526 ppr_options, AHD_TRANS_GOAL, FALSE); 2527 ahd_unlock(ahd, &flags); 2528 } 2529 2530 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2531 { 2532 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2533 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2534 struct ahd_tmode_tstate *tstate; 2535 struct ahd_initiator_tinfo *tinfo 2536 = ahd_fetch_transinfo(ahd, 2537 starget->channel + 'A', 2538 shost->this_id, starget->id, &tstate); 2539 struct ahd_devinfo devinfo; 2540 unsigned int ppr_options = tinfo->goal.ppr_options 2541 & ~MSG_EXT_PPR_QAS_REQ; 2542 unsigned int period = tinfo->goal.period; 2543 unsigned int dt; 2544 unsigned long flags; 2545 2546 #ifdef AHD_DEBUG 2547 if ((ahd_debug & AHD_SHOW_DV) != 0) 2548 printk("%s: %s QAS\n", ahd_name(ahd), 2549 qas ? "enabling" : "disabling"); 2550 #endif 2551 2552 if (qas) { 2553 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2554 } 2555 2556 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2557 2558 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2559 starget->channel + 'A', ROLE_INITIATOR); 2560 ahd_find_syncrate(ahd, &period, &ppr_options, 2561 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2562 2563 ahd_lock(ahd, &flags); 2564 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2565 ppr_options, AHD_TRANS_GOAL, FALSE); 2566 ahd_unlock(ahd, &flags); 2567 } 2568 2569 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2570 { 2571 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2572 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2573 struct ahd_tmode_tstate *tstate; 2574 struct ahd_initiator_tinfo *tinfo 2575 = ahd_fetch_transinfo(ahd, 2576 starget->channel + 'A', 2577 shost->this_id, starget->id, &tstate); 2578 struct ahd_devinfo devinfo; 2579 unsigned int ppr_options = tinfo->goal.ppr_options 2580 & ~MSG_EXT_PPR_IU_REQ; 2581 unsigned int period = tinfo->goal.period; 2582 unsigned int dt; 2583 unsigned long flags; 2584 2585 #ifdef AHD_DEBUG 2586 if ((ahd_debug & AHD_SHOW_DV) != 0) 2587 printk("%s: %s IU\n", ahd_name(ahd), 2588 iu ? "enabling" : "disabling"); 2589 #endif 2590 2591 if (iu && spi_max_width(starget)) { 2592 ppr_options |= MSG_EXT_PPR_IU_REQ; 2593 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2594 } 2595 2596 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2597 2598 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2599 starget->channel + 'A', ROLE_INITIATOR); 2600 ahd_find_syncrate(ahd, &period, &ppr_options, 2601 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2602 2603 ahd_lock(ahd, &flags); 2604 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2605 ppr_options, AHD_TRANS_GOAL, FALSE); 2606 ahd_unlock(ahd, &flags); 2607 } 2608 2609 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2610 { 2611 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2612 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2613 struct ahd_tmode_tstate *tstate; 2614 struct ahd_initiator_tinfo *tinfo 2615 = ahd_fetch_transinfo(ahd, 2616 starget->channel + 'A', 2617 shost->this_id, starget->id, &tstate); 2618 struct ahd_devinfo devinfo; 2619 unsigned int ppr_options = tinfo->goal.ppr_options 2620 & ~MSG_EXT_PPR_RD_STRM; 2621 unsigned int period = tinfo->goal.period; 2622 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2623 unsigned long flags; 2624 2625 #ifdef AHD_DEBUG 2626 if ((ahd_debug & AHD_SHOW_DV) != 0) 2627 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2628 rdstrm ? "enabling" : "disabling"); 2629 #endif 2630 2631 if (rdstrm && spi_max_width(starget)) 2632 ppr_options |= MSG_EXT_PPR_RD_STRM; 2633 2634 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2635 starget->channel + 'A', ROLE_INITIATOR); 2636 ahd_find_syncrate(ahd, &period, &ppr_options, 2637 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2638 2639 ahd_lock(ahd, &flags); 2640 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2641 ppr_options, AHD_TRANS_GOAL, FALSE); 2642 ahd_unlock(ahd, &flags); 2643 } 2644 2645 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2646 { 2647 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2648 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2649 struct ahd_tmode_tstate *tstate; 2650 struct ahd_initiator_tinfo *tinfo 2651 = ahd_fetch_transinfo(ahd, 2652 starget->channel + 'A', 2653 shost->this_id, starget->id, &tstate); 2654 struct ahd_devinfo devinfo; 2655 unsigned int ppr_options = tinfo->goal.ppr_options 2656 & ~MSG_EXT_PPR_WR_FLOW; 2657 unsigned int period = tinfo->goal.period; 2658 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2659 unsigned long flags; 2660 2661 #ifdef AHD_DEBUG 2662 if ((ahd_debug & AHD_SHOW_DV) != 0) 2663 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2664 wrflow ? "enabling" : "disabling"); 2665 #endif 2666 2667 if (wrflow && spi_max_width(starget)) 2668 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2669 2670 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2671 starget->channel + 'A', ROLE_INITIATOR); 2672 ahd_find_syncrate(ahd, &period, &ppr_options, 2673 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2674 2675 ahd_lock(ahd, &flags); 2676 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2677 ppr_options, AHD_TRANS_GOAL, FALSE); 2678 ahd_unlock(ahd, &flags); 2679 } 2680 2681 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2682 { 2683 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2684 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2685 struct ahd_tmode_tstate *tstate; 2686 struct ahd_initiator_tinfo *tinfo 2687 = ahd_fetch_transinfo(ahd, 2688 starget->channel + 'A', 2689 shost->this_id, starget->id, &tstate); 2690 struct ahd_devinfo devinfo; 2691 unsigned int ppr_options = tinfo->goal.ppr_options 2692 & ~MSG_EXT_PPR_RTI; 2693 unsigned int period = tinfo->goal.period; 2694 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2695 unsigned long flags; 2696 2697 if ((ahd->features & AHD_RTI) == 0) { 2698 #ifdef AHD_DEBUG 2699 if ((ahd_debug & AHD_SHOW_DV) != 0) 2700 printk("%s: RTI not available\n", ahd_name(ahd)); 2701 #endif 2702 return; 2703 } 2704 2705 #ifdef AHD_DEBUG 2706 if ((ahd_debug & AHD_SHOW_DV) != 0) 2707 printk("%s: %s RTI\n", ahd_name(ahd), 2708 rti ? "enabling" : "disabling"); 2709 #endif 2710 2711 if (rti && spi_max_width(starget)) 2712 ppr_options |= MSG_EXT_PPR_RTI; 2713 2714 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2715 starget->channel + 'A', ROLE_INITIATOR); 2716 ahd_find_syncrate(ahd, &period, &ppr_options, 2717 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2718 2719 ahd_lock(ahd, &flags); 2720 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2721 ppr_options, AHD_TRANS_GOAL, FALSE); 2722 ahd_unlock(ahd, &flags); 2723 } 2724 2725 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2726 { 2727 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2728 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2729 struct ahd_tmode_tstate *tstate; 2730 struct ahd_initiator_tinfo *tinfo 2731 = ahd_fetch_transinfo(ahd, 2732 starget->channel + 'A', 2733 shost->this_id, starget->id, &tstate); 2734 struct ahd_devinfo devinfo; 2735 unsigned int ppr_options = tinfo->goal.ppr_options 2736 & ~MSG_EXT_PPR_PCOMP_EN; 2737 unsigned int period = tinfo->goal.period; 2738 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2739 unsigned long flags; 2740 2741 #ifdef AHD_DEBUG 2742 if ((ahd_debug & AHD_SHOW_DV) != 0) 2743 printk("%s: %s Precompensation\n", ahd_name(ahd), 2744 pcomp ? "Enable" : "Disable"); 2745 #endif 2746 2747 if (pcomp && spi_max_width(starget)) { 2748 uint8_t precomp; 2749 2750 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2751 const struct ahd_linux_iocell_opts *iocell_opts; 2752 2753 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2754 precomp = iocell_opts->precomp; 2755 } else { 2756 precomp = AIC79XX_DEFAULT_PRECOMP; 2757 } 2758 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2759 AHD_SET_PRECOMP(ahd, precomp); 2760 } else { 2761 AHD_SET_PRECOMP(ahd, 0); 2762 } 2763 2764 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2765 starget->channel + 'A', ROLE_INITIATOR); 2766 ahd_find_syncrate(ahd, &period, &ppr_options, 2767 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2768 2769 ahd_lock(ahd, &flags); 2770 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2771 ppr_options, AHD_TRANS_GOAL, FALSE); 2772 ahd_unlock(ahd, &flags); 2773 } 2774 2775 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2776 { 2777 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2778 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2779 struct ahd_tmode_tstate *tstate; 2780 struct ahd_initiator_tinfo *tinfo 2781 = ahd_fetch_transinfo(ahd, 2782 starget->channel + 'A', 2783 shost->this_id, starget->id, &tstate); 2784 struct ahd_devinfo devinfo; 2785 unsigned int ppr_options = tinfo->goal.ppr_options 2786 & ~MSG_EXT_PPR_HOLD_MCS; 2787 unsigned int period = tinfo->goal.period; 2788 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2789 unsigned long flags; 2790 2791 if (hold && spi_max_width(starget)) 2792 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2793 2794 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2795 starget->channel + 'A', ROLE_INITIATOR); 2796 ahd_find_syncrate(ahd, &period, &ppr_options, 2797 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2798 2799 ahd_lock(ahd, &flags); 2800 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2801 ppr_options, AHD_TRANS_GOAL, FALSE); 2802 ahd_unlock(ahd, &flags); 2803 } 2804 2805 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2806 { 2807 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2808 unsigned long flags; 2809 u8 mode; 2810 2811 ahd_lock(ahd, &flags); 2812 ahd_pause(ahd); 2813 mode = ahd_inb(ahd, SBLKCTL); 2814 ahd_unpause(ahd); 2815 ahd_unlock(ahd, &flags); 2816 2817 if (mode & ENAB40) 2818 spi_signalling(shost) = SPI_SIGNAL_LVD; 2819 else if (mode & ENAB20) 2820 spi_signalling(shost) = SPI_SIGNAL_SE; 2821 else 2822 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2823 } 2824 2825 static struct spi_function_template ahd_linux_transport_functions = { 2826 .set_offset = ahd_linux_set_offset, 2827 .show_offset = 1, 2828 .set_period = ahd_linux_set_period, 2829 .show_period = 1, 2830 .set_width = ahd_linux_set_width, 2831 .show_width = 1, 2832 .set_dt = ahd_linux_set_dt, 2833 .show_dt = 1, 2834 .set_iu = ahd_linux_set_iu, 2835 .show_iu = 1, 2836 .set_qas = ahd_linux_set_qas, 2837 .show_qas = 1, 2838 .set_rd_strm = ahd_linux_set_rd_strm, 2839 .show_rd_strm = 1, 2840 .set_wr_flow = ahd_linux_set_wr_flow, 2841 .show_wr_flow = 1, 2842 .set_rti = ahd_linux_set_rti, 2843 .show_rti = 1, 2844 .set_pcomp_en = ahd_linux_set_pcomp_en, 2845 .show_pcomp_en = 1, 2846 .set_hold_mcs = ahd_linux_set_hold_mcs, 2847 .show_hold_mcs = 1, 2848 .get_signalling = ahd_linux_get_signalling, 2849 }; 2850 2851 static int __init 2852 ahd_linux_init(void) 2853 { 2854 int error = 0; 2855 2856 /* 2857 * If we've been passed any parameters, process them now. 2858 */ 2859 if (aic79xx) 2860 aic79xx_setup(aic79xx); 2861 2862 ahd_linux_transport_template = 2863 spi_attach_transport(&ahd_linux_transport_functions); 2864 if (!ahd_linux_transport_template) 2865 return -ENODEV; 2866 2867 scsi_transport_reserve_device(ahd_linux_transport_template, 2868 sizeof(struct ahd_linux_device)); 2869 2870 error = ahd_linux_pci_init(); 2871 if (error) 2872 spi_release_transport(ahd_linux_transport_template); 2873 return error; 2874 } 2875 2876 static void __exit 2877 ahd_linux_exit(void) 2878 { 2879 ahd_linux_pci_exit(); 2880 spi_release_transport(ahd_linux_transport_template); 2881 } 2882 2883 module_init(ahd_linux_init); 2884 module_exit(ahd_linux_exit); 2885